一个游戏机?没错!!就是一个8位游戏机。
电路比较简单:ATmega644 和一个 AD725 RGB/NTSC 转换电路。
视频DAC是由R/2R电阻网络构成的(又看到这种简易东西了),毕竟只有256色,稍微细心挑选还是可以满足要求的。
Specifications:
CPU: ATmega644 microcontroller
Total RAM: 4K
Program Memory: 64K
Speed: 28.61818Mhz (Overclocked)//居然是超频的!单片机也超频(好像有个电影:修女也疯狂)
Colors: 256 simultaneous colors arranged in a 3:3:2 color space (Red:3 bits, Green:3 bits, Blue: 2 bits)
Resolution: 240x224 pixels in tiles-only mode
Video output: NTSC Composite
Sound: 4 channels wavetable, 8-bit mono, mixed at ~15Khz and output via PWM
Inputs: Two NES compatible joypad inputs
Options: MIDI-in interface and s-video output
附上 Ladyada 的评语:
Ladyada writes on ladyada's ranting:
The UzeBox the coolest thing I've seen in a really really long time, a full tile-based gaming system built on a Atmega644 + AD725 (which does all the nasty colorburst stuff). Ive spent some time with the AD725 but at the time I was using an Atmega16 and didn't get nearly as far - pretty much just colorbars.
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